The joist support helps reinforce the floor so it can handle the weight load it needs to.
Floor joist support systems.
Each smartjack post rests on a precast concrete pad that is set on a base of compacted stone.
While some floors are built directly on a concrete slab those built above open areas such as crawl spaces basements and lower floors almost always use a floor joist system to provide weight bearing support for flooring furniture people and everything else in your home.
Solid blocking should be used where floor joists overlap over beams.
The best way to permanently solve sagging bouncy floor problems is to install smartjack posts beneath the beam that supports your crawl space joists.
A joist support is the horizontal beam that supports the floor joists.
Providing more support and rigidity than cross bracing solid blocking is a reasonable alternative but can be an obstacle for running plumbing pipes and electrical wire between floor joists.
In some cases additional joist supports will have to be installed before there can be extra heavy objects on the floor.
Crawl space joist supports are steel adjustable support posts that are installed to repair sagging floors.
It should be placed at eight foot intervals between any floor joists 2x10 or longer.